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Accounts Payable and Accrued Expenses
12 Months Ended
Dec. 31, 2023
Payables and Accruals [Abstract]  
Accounts Payable and Accrued Expenses Accounts Payable and Accrued Expenses
Accounts payable and accrued expenses consisted of the following:
December 31,
 20232022
 (Dollars in millions)
Trade accounts payable$275.8 $240.7 
Accrued payroll and related benefits174.3 199.4 
Other accrued expenses142.4 148.0 
Income taxes payable120.8 25.9 
Accrued royalties71.2 88.4 
Accrued taxes other than income59.3 20.0 
Asset retirement obligations54.2 84.2 
Accrued insurance32.7 22.7 
Operating lease liabilities17.3 16.8 
Workers’ compensation obligations8.7 9.3 
Liabilities associated with discontinued operations5.2 41.9 
Accrued interest3.6 8.2 
Accounts payable and accrued expenses$965.5 $905.5